JPH01294076A - Paper-supplying device - Google Patents

Abstract

PURPOSE:To enable separation and supply of papers differing in thickness, by performing separation and supply through utilizing the functions of a first paper-separating claw, a cut paper stopper and a paper-supplying roller in the case of ordinary papers and utilizing a gap between a second or third paper- separating claw and the paper-supplying roller in the case of thick papers such as postal cards. CONSTITUTION:At the time of supplying an ordinary paper, paper guide members 12 are disposed respectively at both outer sides, corners of the leading end of the paper are disposed to be engaged with first paper-separating claws 6, and the paper is separated and supplied by the functions of paper-supplying rollers 8 and the claws 6. In this case, the load of the paper is shared by cut paper stoppers 9 so that only appropriate loads are exerted on the first paper- separating claws 6. At the time of supplying postal cards, the guide members 12 are disposed at inner positions, and the postal cards are separated and supplied one sheet at a time by the functions of second separating claws 10 and the paper-supplying roller 8. When two or more sheets are erroneously fed at a time, the surplus sheets are stopped by third separating claws 20, whereby only one sheet can be accurately supplied.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a paper feeding device used in a printer, etc., that automatically feeds sheets of paper stacked on a paper u tray one by one. .

[Conventional technology]

In general, the following paper feeding devices are used to feed paper to the printing section of a printer, for example, a printing device in which a printing element is placed facing a roll-shaped platen and the printing element prints on the paper set on the platen. ing.

That is, sheets of paper (cut sheets) are stacked and stored in a paper feed stacker, and the paper is fed out by a paper feed roller that engages with the uppermost sheet, and at the same time only the uppermost sheet is separated and supplied to the printing section of the printer. Normally, the printing section is equipped with a pair of paper feed rollers, and when the leading edge of the paper is bitten by this pair of rollers, the pair of rollers feeds the paper to the initial printing position on the platen facing the printing element, and printing is performed. be done.

When it is necessary to use paper of different sizes, such as JIS standard 3, the side edge guides of the paper feed stacker are attached to the paper loading table (bottom plate) so as to be movable in the width direction, and at the same time the separation claws are also attached to the side edge guides. I try to move as one.

The paper feed roller also moves in conjunction with the side edge guides to a position corresponding to the paper size.

In other words, the paper feed roller, separation claw, and side edge guide are interlocked with each other and move as a unit depending on the paper size.For example, the separation claw is attached to the side edge guide, and this side edge guide is mounted on the rotating shaft. The paper feed O-ra is engaged with the paper feed O-ra, which is the main part, so that the paper feed O-ra slides along the rotation shaft in the axial direction together with the side edge guide.

(Problem to be Solved by the Invention) However, in the paper feeding device using the separation claw as described above, although it is suitable when using ordinary paper (plain paper) with weak paper stiffness, it is not suitable for use with postcards. Since it is invulnerable to separating and feeding thick and stiff paper, in order to send postcards, a paper feeder with a fixed separation claw with a constant gap from the paper feed roller is recommended. It was necessary to have a separate paper supply vtWI and use two paper feed vtWIs depending on the paper being used.

The present invention has been made in order to solve these problems, and an object of the present invention is to provide a paper feeder capable of separating and feeding thick yellow paper.

[Means to solve the problem]

In order to achieve the above-mentioned object, the present invention includes a paper feed roller connected to an appropriate driving means, a vertically movable paper loading table that pushes up and presses stacked sheets onto the paper feed roller, and A first paper separation claw provided on the side of the tray, a cut paper stopper provided outside the paper feed roller so as to face the paper feed roller, and a cut paper stopper provided on the outside of the paper feed roller to face the paper feed roller, and a cut paper separation claw provided on the inside of the cut paper stopper. - a second paper separation claw formed so that the gap between the paper separation claw and the second paper separation claw is constant;
and a third paper separation claw formed inside the paper separation claw.

(effect) The measures described above operate as follows.

When using plain paper, the first paper separation claw, cut paper stopper, and paper feed roller work together to separate and feed the paper.When using thick, stiff paper such as postcards, the paper is separated and fed. , shift the setting position of the postcard etc. inward from the first paper separation claw, and move it to the second paper separation claw or the third paper separation claw.
The postcards are separated and fed using the gap between the paper separation claw and the paper feed roller.

〔Example〕

Hereinafter, the present invention will be explained in detail using the drawings.

FIGS. 1 to 3 show schematic configuration diagrams of the paper feeding device of the present invention, FIG. 1 is a plan view showing the schematic configuration when using plain paper, and FIG. 2 is a plan view showing the schematic configuration when using postcards. , FIG. 3 is an explanatory diagram schematically showing the positional relationship between the paper feed roller and each separation claw.

In the figure, reference numeral 1.1 denotes a paper feed block, which is provided so as to be movable on the support shaft 11 in the paper width direction (horizontal direction in the figure). In this paper feed block 1.1, in addition to the side plate 2 and the fixed portion of the hopper part 3, paper 4 is placed, as shown in FIG. 4. Paper +1! Four tables 5 are provided, and a first separating claw 6 is provided on the side of the sheet mounting table 5 to engage with the leading edge corner of the uppermost sheet. Also, the paper loading table 5 is moved by the spring 7 to the paper feeding roller 811! energized by l. A cut paper stopper 9 is formed outside the paper feed roller 8 in the hopper 3 of the paper feed block 10 with a constant gap from the paper feed roller 8. 10 is located at a position facing the paper feed row 58,
11 with paper feed 0-58 is a second paper separation claw that forms a paper feed interval G corresponding to the thickness of one postcard, and 20 is a paper feed further inside the second paper separation claw 10. This is a third separating claw formed in the hopper 3 with a constant gap from the roller 8.

Further, 12 is a paper guide member provided on the paper mounting table 5 so as to be movable in the paper width direction. 13 is paper feed block i
, imt,: Paper supporting members 1 and 14 for preventing the central part of the paper from deflecting are motors, and the rotation of this motor 14 is transmitted to the paper feed roller shaft 11 via a transmission gear group 15. and rotates the paper feed roller 8.

Also, cut paper stopper 9. The position between the second paper separation claw 10 and the third paper separation claw 20 and the paper feed row 58! ! As shown in FIG. 3, the distance between the second paper separation claw 10 and the paper feed roller 8 is equivalent to that of a postcard, and the third paper separation claw 20 is spaced apart from the second paper separation claw 10. The cut paper stopper 9 is also arranged such that its tip is located away from the paper feed roller 8, and the tip of the cut paper stopper 9 is also positioned away from the second paper separation claw 10.
It is formed so as to be located further away from the paper feed roller 8 than the tip of the paper feed roller 8 .

In such a paper feed II, when feeding plain paper, the paper guide members 12 are moved to both outside sides, and the leading corner of the paper is arranged so as to engage the first separation claw 6, and the paper feed roller 58 and the first paper separation claw 9 to separate and feed the paper. At this time, if all the paper load is applied to the first paper separation claw 6, the load may become too large and it may no longer function as a separation claw, so the paper load is shared by the function of the cut paper stopper 9. , only a moderate load is applied to the first separation claw 6. Also, when feeding postcards, use the paper guide member 1 as shown in Figure 2.
2 to the inside (if the postcard is used horizontally, the broken line in Figure 2), set the postcard so that it escapes from the first paper separation claw 6, and connect the second separation claw 10 and paper feed roller 8. Separates and feeds each sheet one by one. As mentioned above, the distance between the second separation claw 10 and the paper feed O-ra 8 is equivalent to one postcard, and normally the paper is separated and fed one by one, but if two sheets are accidentally separated and fed. Even if more than one sheet is fed, the third sheet separating claw 20 stops the excess sheets, so that only one sheet can be fed accurately.

In this way, by appropriately changing the set positions of the paper guide member and the paper feed block 1.1, it is possible to separate and feed sheets of different thickness with one paper feed device.

〔effect〕

As described above, the paper feeding device of the present invention includes a paper feeding roller connected to an appropriate driving means, a vertically movable paper loading table that pushes up and presses stacked sheets against the paper feeding roller, and A first paper separating claw provided on the side of the paper loading table, a cut paper stopper provided outside the paper feed roller to face the paper feed roller, and a cut paper stopper provided on the inside of this cut paper stopper. A second paper separation claw formed so as to have a constant gap with the paper roller, and a third separation claw formed inside the second separation claw formed inside the second paper separation claw. With this configuration, it is possible to accurately separate and feed sheets of different thickness one by one using one paper feeder, and the number of sheets can be changed to 111It1.
It also provides the remarkable effect of lowering costs.

[Brief explanation of the drawing]

1 to 3 all show embodiments of the present invention,
Fig. 1 is a plan view showing a schematic configuration when using plain paper, Fig. 2 is a plan view showing a schematic configuration when using a postcard, and Fig. 3 is a plan view showing a schematic configuration when using a postcard.
The figure is a schematic view showing the relationship between the paper feed roller and the respective separating claws, and FIG. 4 is a side view of the schematic structure of the paper feed block shown in FIG. 1 J3 and FIG. 2. 1.1...Paper feed block, 6...First separation claw, 8
...Paper feed roller, 9...Cut paper stopper, 10
...Second separation claw, 20...Third separation claw. 2. 1st ward 2nd =

Claims (1)

[Claims] A paper feed roller connected to an appropriate driving means, a vertically movable paper loading table that pushes up and presses stacked sheets against the paper feeding roller, and a first paper separating claw provided on the side of the paper loading table. a cut paper stopper provided on the outside of the paper feed roller to face the paper feed roller; and a second cut paper stopper formed on the inside of the cut paper stopper so as to maintain a constant gap between the cut paper stopper and the paper feed roller. A paper feeding device comprising: a paper separation claw; and a third paper separation claw formed inside the second paper separation claw.